Tim Edwards, the president of the Professional Association of Foreign Service Officers, made the offer to Clement in a letter sent today.

The letter, which sets a deadline for the offer of noon Tuesday, says the job action is having an impact on tourism, education, air transport and agriculture, and is also delaying the processing of visas and immigration applications.

Clement has told the union he has made a fair and reasonable offer, and has urged its members to return to work.